Abstract: A refractive index is this nifty little way to describe how light passes through a medium. It's also the basis for a new Avon invention, which applies optical illusion to impart cosmetic benefits. So, it's magic.

What could possibly, without surgery, instantly iron out wrinkles or plump up the lips? Fractal particle gels. This patent explains.

These inventors have discovered that fractal particle gels containing a refractive index-matching polymer can, upon application to the skin or lips, create a film that gives the effect of smooth skin surfaces, thus concealing fine lines and wrinkles. The fractal gel network contains oppositely charged nanoparticles, which impart space-filling effects.

Additional applications are described including hair treatment products, especially as mascaras to treat thinning hair, in light of the porous, reticulated structure. Also, filling pores, skin surface unevenness and imperfections; and smoothing a layer onto skin in conjunction with a topcoat pigmented layer, to make skin appear brighter and to release light.